Metal–organic frameworks—prospective industrial applications

Muêller, U.; Schubert, Markus M.; Teich, F.; Puetter, H.; Schierle‐Arndt, Kerstin; Pastre, Julio Cezar

doi:10.1039/b511962f

Cited by 2,159 publications

(1,370 citation statements)

References 28 publications

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“…Secondly, it can be clearly to seen from Fig. 3a-c that the performance order for the separation factor of different amine functional groups is -NHCH 2 CH 2 NH 2 4 -NH 2 or -NHCOH 4 and -NHCOCH 3 . One of reasons is that -NHCH 2 CH 2 NH 2 has two active amine functional groups, which possess more specific interactions with CO 2 molecules.…”

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confidence: 85%

Design of amine-functionalized metal–organic frameworks for CO₂ separation: the more amine, the better?

et al. 2016

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A total of 41 825 metal-organic frameworks (MOFs) were computationally screened toward the design of amine-functionalized MOFs for CO 2 separation. Both the optimal species and number of amine functional groups were examined for eight MOFs with good performance in terms of CO 2 uptake and selectivity. It was revealed that more amine functional groups grafted on the MOFs do not lead to a better CO 2 separation capability, and the concept of saturation degree of functional groups was proposed. The ethylenediamine-functionalized MOF-74 membrane was predicted to possess high CO 2 permeation separation capability, which was confirmed by the parallel experimental test of gas permeation.Metal-organic frameworks (MOFs) have received tremendous interest in the past few decades due to their large potential for H 2 storage, 1 CO 2 capture, 2 catalysis, 3 gas separation and purification, 4 liquid separation 5 and drug delivery. 6 However, the performance of many synthesized MOFs cannot satisfy industrial demands. Therefore, their functionalized counterparts have attracted considerable attention because they are more effective compared with the original ones, such as their higher separation efficiency, 7 gas storage, 8 catalytic performance 9 and luminescence capability. 10 H 2 and CH 4 are considered as environmentally friendly energy carriers and have received much attention. Nevertheless, the presence of CO 2 in them remarkably decreases their heat values. Moreover, in a moist environment, CO 2 can react with water to produce carbonic acid, leading to corrosive effects not only on the equipment but also on the pipes during transportation. 11 Consequently, CO 2 separation from H 2 or CH 4 is crucial in the processing of clean fuels. Toward this end, the functionalization of MOFs by amine functional groups has been recognized as an effective technique to improve the adsorption and separation of acidic CO 2 . 12 In the literature, a larger number of amine-functionalized MOFs have been synthesized and tested. 13 Vaidhyanathan et al. 14 reported the crystallographic resolution of amine-functionalized MOFs and their analysis showed that the low-pressure binding and large uptake of CO 2 were influenced by three factors, i.e., strongly interacting amine functional groups, suitable pore size and the cooperative binding of CO 2 molecules. Ahnfeldt et al. 15 synthesized four amine-functionalized MOFs including CAU-1-NH 2 , CAU-1-NHCH 3 , CAU-1-NH 2 (OH) and CAU-1-NHCOCH 3 , and examined the effects of time and temperature.While a wide variety of MOFs can be modified for CO 2 separation, it remains elusive which specific MOFs are suitable to be functionalized, which functional groups have the best improvement and what is the optimal number of functional groups. In most experimental efforts, many MOFs were modified by trial-and-error, resulting in a slight chance of successful synthesis and actual enhancement in performance. It is thus of great significance to unravel how functionalized MOFs can be rationally designed from a computa...

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Design of amine-functionalized metal–organic frameworks for CO₂ separation: the more amine, the better?

et al. 2016

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“…The chemicals 3-aminopyridine (Sigma Aldrich), pyvaloyl chloride (Merck), tetramethylethylenediamine (TMEDA, Merck), nitrosobenzene (Fluka), n-BuLi, 1.6 M (Acros) and Pd(PPh 3 ) 4 (ABCR) were obtained commercially and used as received. 3-Azo-phenyl-4,4¢-bipyridine (1) was synthesized from 3-aminopyridine and pivalic acid chloride in a five step synthesis ( Fig.…”

Section: Experimental Materialsmentioning

confidence: 99%

“…The switching experiments and UV/vis measurements for CAU-5 were performed in a mixture of the microcrystalline powder and BaSO 4 . The UV/vis spectra were measured in reflection geometry.…”

Section: Switching Experimentsmentioning

confidence: 99%

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The first porous MOF with photoswitchable linker molecules

Modrow¹,

Zargarani²,

Herges³

et al. 2011

Dalton Trans.

181

163

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We synthesized a porous twofold interpenetrated MOF [Zn 2 (NDC) 2 (1)] (coined CAU-5) using 3-azo-phenyl-4,4¢-bipyridine (1), 2,6-naphthalenedicarboxylic acid, and Zn(NO 3 ) 2 ·6H 2 O. The azo-functionality protrudes into the pores, and can be switched, by irradiation with UV light (365 nm), from the thermodynamically stable trans-isomer to the cis-isomer. Back-switching was achieved thermally and with an irradiation wavelength of l max = 440 nm.

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“…[1][2][3][4] In literature, the term MOF covers a wide assembly of hybrid compounds. [4,5] Because of the exceptionally high pore volume and surface area of MOFs, many research efforts have been spent to their application in the sorption of light gases, either as such [6][7][8][9][10] or after modification with, for example, Ba 2 + . [11] As porous materials, MOFs may also find applications in catalysis.…”

Section: Introductionmentioning

confidence: 99%

Probing the Lewis Acidity and Catalytic Activity of the Metal–Organic Framework [Cu₃(btc)₂] (BTC=Benzene‐1,3,5‐tricarboxylate)

Alaerts

Séguin

Poelman

et al. 2006

Chemistry A European J

662

439

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An optimized procedure was designed for the preparation of the microporous metal–organic framework (MOF) [Cu3(btc)2] (BTC=benzene‐1,3,5‐tricarboxylate). The crystalline material was characterized by X‐ray diffraction, optical microscopy, SEM, X‐ray photoelectron spectroscopy, N2 sorption, thermogravimetry, and IR spectroscopy of adsorbed CO. CO adsorbs on a small number of Cu2O impurities, and particularly on the free CuII coordination sites in the framework. [Cu3(btc)2] is a highly selective Lewis acid catalyst for the isomerization of terpene derivatives, such as the rearrangement of α‐pinene oxide to campholenic aldehyde and the cyclization of citronellal to isopulegol. By using the ethylene ketal of 2‐bromopropiophenone as a test substrate, it was demonstrated that the active sites in [Cu3(btc)2] are hard Lewis acids. Catalyst stability, re‐usability, and heterogeneity are critically assessed.

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Metal–organic frameworks—prospective industrial applications

Abstract: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Cited by 2,159 publications

References 28 publications

Design of amine-functionalized metal–organic frameworks for CO₂ separation: the more amine, the better?

Design of amine-functionalized metal–organic frameworks for CO₂ separation: the more amine, the better?

The first porous MOF with photoswitchable linker molecules

Probing the Lewis Acidity and Catalytic Activity of the Metal–Organic Framework [Cu₃(btc)₂] (BTC=Benzene‐1,3,5‐tricarboxylate)

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Metal–organic frameworks—prospective industrial applications

Abstract: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Cited by 2,159 publications

References 28 publications

Design of amine-functionalized metal–organic frameworks for CO2 separation: the more amine, the better?

Design of amine-functionalized metal–organic frameworks for CO2 separation: the more amine, the better?

The first porous MOF with photoswitchable linker molecules

Probing the Lewis Acidity and Catalytic Activity of the Metal–Organic Framework [Cu3(btc)2] (BTC=Benzene‐1,3,5‐tricarboxylate)

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Product

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Design of amine-functionalized metal–organic frameworks for CO₂ separation: the more amine, the better?

Design of amine-functionalized metal–organic frameworks for CO₂ separation: the more amine, the better?

Probing the Lewis Acidity and Catalytic Activity of the Metal–Organic Framework [Cu₃(btc)₂] (BTC=Benzene‐1,3,5‐tricarboxylate)